A quinoline-based Schiff base for significant fluorescent “turn-on” and absorbance-ratiometric detection of Al3+

  • Yu-Qing Ma
  • Xue-Jiao Sun
  • Ming-Qiang Li
  • Shuang Zeng
  • Zhi-Yong XingEmail author
  • Jin-Long Li
Original Paper


A novel quinoline-based Schiff base fluorescent sensor BQPA had been synthesized and characterized by common spectroscopic methods. It showed highly sensitive fluorescent enhancement (300-fold) and ratiometric absorbance for the determination of Al3+ with low detection limits of 31 nM in CH3CH2OH/H2O (1: 9, v/v) solution. The stoichiometry of the BQPA–Al3+ complex was 1:1, determined by Job plots curve and further confirmed by HRMS, 1H NMR titration and FT-IR spectrum. Moreover, the potential application of BQPA in the detection of Al3+ was estimated in real water samples.

Graphical abstract


Quinoline Schiff base Fluorescence Ratiometric Al3+ 



This work was supported by the Research Science Foundation in Technology Innovation of Harbin (no. 2017RAQXJ022) and the Postdoctoral Scientific Research Developmental Fund of Heilongjiang Province (no. LBH-Q14023). We would like to thank Zhe Wang (Qiqihar University) for the MS measurement.

Supplementary material

11696_2019_698_MOESM1_ESM.doc (3.8 mb)
Supplementary material 1 (DOC 3920 kb)


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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2019

Authors and Affiliations

  • Yu-Qing Ma
    • 1
  • Xue-Jiao Sun
    • 1
  • Ming-Qiang Li
    • 1
  • Shuang Zeng
    • 1
  • Zhi-Yong Xing
    • 1
    Email author
  • Jin-Long Li
    • 2
  1. 1.Department of Applied Chemistry, College of ScienceNortheast Agricultural UniversityHarbinPeople’s Republic of China
  2. 2.School of Chemistry and Chemical EngineeringQiqihar UniversityQiqiharPeople’s Republic of China

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